Summarize some of the basic elements of the Javaio reviewed today

1. Look at the Java programming idea IO This part of the time encountered a topic, need to use the string inversion, so recorded

Package com.jww.china.app.test.all.io;/** * @ClassName: Stringreverseutil * @Description: Implementing your own Java string inversion class * @author dimension * @d  ATE August 29, 2015 PM 7:35:11 *  */public class Stringreverseutil {public static void main (string[] args) {String s= ' I love Java "; System.out.println (ReverseString (s));} protected static string ReverseString (string s) {char[] C=s.tochararray (); int Begin=0;int end=c.length-1;// System.out.println (Swapchar (c, begin, end)), Swapchar (c, Begin, end), for (int i=0;i<end;i++) {if (c[i]== ') {Swapchar (c, Begin, i-1); begin=i+1;}} return new String (c);} /** * @Title: Swapchar * @Description: Converts the entire string to char, reverses the entire char * @param @param c* @param @param begin* @param @param end    * @return void    return type * */protected static String Swapchar (char[] c, int begin, int end) {while (begin<end) {Char temp=c[begin];c[begin]=c[end];c[end]=temp;begin++;end--;} return new String (c);}}

2. Basic file output

Package Com.jww.china.app.test.all.io;import Java.io.bufferedreader;import Java.io.file;import Java.io.filenotfoundexception;import Java.io.filereader;import Java.io.ioexception;import Java.io.PrintWriter; Import java.io.stringreader;/** * @ClassName: Basicfileoutput * @Description: Read from one file, then write to another file, basic file output * @author dimension * @date August 29, 2015 PM 8:51:53 * */public class Basicfileoutput {public static void main (string[] args) throws IOException {WriteFile ();} private static void WriteFile () throws Ioexception{bufferedreader in=new BufferedReader (New StringReader (ReadFile ())); PrintWriter printwriter=new PrintWriter (New File ("D:/b.txt")); String s;int Linecount=0;while ((S=in.readline ())!=null) {printwriter.println (++linecount+ ":" +s);}    Printwriter.close ();} private static String ReadFile () throws Ioexception{bufferedreader b=new BufferedReader (New FileReader ("D:/a.txt")); StringBuilder sb=new StringBuilder (); String Str;while ((Str=b.readline ())!=null) {sb.append (str+ "\ n");} B.close (); return SB. toString ();}} 

3. Buffered input file

Package Com.jww.china.app.test.all.io;import Java.io.bufferedreader;import Java.io.filenotfoundexception;import Java.io.filereader;import Java.io.ioexception;import Java.lang.reflect.array;import Java.util.ArrayList;import Java.util.arrays;import Java.util.collections;import Java.util.linkedlist;import Java.util.List;import java.util.scanner;/** * @ClassName: Bufferediputfile * @Description: Buffered input file, basic file input * @author dimension * @date August 29, 2015 5:57 : */public class Basicfileinput {public static void main (string[] args) throws IOException {reverserstring ();//revers    Estr ();//system.out.println (Bufferedinputfile ("D:/a.txt")); BufferedReader ("D:/a.txt");}     /** * @Title: REVERSESTR * @Description: No space jdk comes with method inversion String * @param * @return void return type *    */private static void Reversestr () {Scanner s=new Scanner (system.in);    String Str=s.nextline ();    System.out.println (new StringBuilder (str). reverse (). toString ()); System.out.println (New StringreversEutil (). reversestring (str). toString ()); }/** * @Title: reverserstring * @Description: There is a space string, reverse participle, jdk comes with method * @param * @return void return type * */private Stati c void Reverserstring () {Scanner s=new Scanner (system.in); String String=s.nextline (); String[] Str=string.split (""); List<string> list=new arraylist<string> (); list=arrays.aslist (str); Collections.reverse (list), for (String l:list) {System.out.print (L + "");}} /** * @Title: Bufferedinputfile * @Description: Use BufferedReader to enter a file * @param @param filename* @param @return * @param @ Throws FileNotFoundException Set file * @return string return type * @throws */private static string Bufferedinputfile (string f Ilename) throws Filenotfoundexception{bufferedreader read =new BufferedReader (new FileReader (FileName)); String s; StringBuilder sb=new StringBuilder (); try {while ((S=read.readline ())!=null) {sb.append (s+ "\ n");} Read.close ();} catch (IOException e) {e.printstacktrace ();} return sb.tostring ();} /** * @Title: BufferedReader * @DescRiption:todo (here is a sentence describing the function of this method) * @param @param filename* @param @throws ioexception settings file * @return void return type * @thro WS */private static void BufferedReader (String fileName) throws ioexception{BufferedReader read =new bufferedreader (new F          Ilereader (FileName));  Linkedlist<string> l=new linkedlist<string> (); String s; String S1; String s2 = null; while ((S=read.readline ())!=null) {s1=s; L.add (S1);} read.close (); for (int i = 0; i < l.size (); i++) {System.out.println (L.get (i). toString ()); System.out.println (New StringBuilder (L.get (i)). Reverse (). toString ()); }}}

4. Serialization and deserialization of a Java Pojo

Package Com.jww.china.app.test.all.serializable;import Java.io.file;import Java.io.fileinputstream;import Java.io.filenotfoundexception;import Java.io.fileoutputstream;import Java.io.ioexception;import Java.io.objectinputstream;import java.io.objectoutputstream;/** * Test Serialization code * @author Administrator * */public class testserializable {public-static void main (string[] args) throws FileNotFoundException {person-p1=new person (); Person P2=new person (); P1.setage (12); P1.setname ("ww"); P2.setage (13); P2.setname ("Zy"); WriteObject (P1, p2); System.out.println (ReadObject ("D:/a.txt"));  }/** * @param p1 * @param p2 * @throws filenotfoundexception */private static void WriteObject (person P1, person P2) throws  FileNotFoundException {//serialization is output to TXT for the program so it is out of FileOutputStream out =new FileOutputStream (new File ("D:/a.txt")); try {//create write to Objectoutputstreamobjectoutputstream objectoutputstream=new ObjectOutputStream (out) in the specified out; o Bjectoutputstream.writeobject (p1); Objectoutputstream.writeobject (p2); Objectoutputstream.flush (); Out.flush (); Objectoutputstream.close (); Out.close (); System.out.println ("Serialization success!!!" ");} catch (IOException e) {//TODO auto-generated catch Blocke.printstacktrace ();}} private static Object ReadObject (String path) {try {fileinputstream inputstream=new fileinputstream (path); O Bjectinputstream inputstream2=new ObjectInputStream (InputStream);//Stringtemp=inputstream2.readobject (). toString    ();    Object temp= inputstream2.readobject ();    Inputstream.close (); Inputstream2.close (); if (temp!=null) {System.out.println ("Deserialization succeeded!! "); return temp;}} catch (FileNotFoundException e) {//Todo auto-generated catch Blocke.printstacktrace ();} catch (IOException e) {//Todo Au To-generated catch Blocke.printstacktrace ();} catch (ClassNotFoundException e) {//TODO auto-generated catch Blocke.printstacktrace ();}    return null;} }

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.

Summarize some of the basic elements of the Javaio reviewed today